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Fabrication of free-standing ordered fluorescent polymer nanofibres by electrospinning
5. A. Greiner and J. H. Wendorff, Self-Assembled Nanomaterials I- Nanofibers, edited by T. Shimizu ( Springer, Berlin Heidelberg, 2008), pp. 107–171.
See supplementary material at http://dx.doi.org/10.1063/1.4918660
for further details of nanofibre deposition parameters, and photophysical properties of the nanofibres. In Tables S1 and S2, we list the measured diameters of random and aligned fibers. Table S3 lists the calculated order parameters of the fibers. In supplementary Figure S1, we show the x-component of the transverse electric field, at a range of distances below the tip. Figures S2 and S3 show the x- and z-electric field components close to the parallel collection plates. Figure S4 shows a fluorescence image of the fibres and their photoluminescence excitation and emission spectra.[Supplementary Material]
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We demonstrate a static fabrication approach to make free-standing ordered arrays of fluorescent nanofibres through control of the transverse electrospinning field. The alignment and the density of the nanofibre arrays are optimised by careful design of both the source and collector electrode geometries which can control the transverse electric field over the full path of the jet. In doing so, we fabricate suspended fluorescent nanofibres with an aspect ratio of 104, and with a substantially increased density and order parameter (by a factor of ∼10 compared to random deposition). Electrostatic modelling suggests that the field distribution of the component is the main contribution to the ordering between the plates. This method offers increased efficiency for the creation of ordered fibres collected over a small area and the characterisation of their photoluminescent properties.
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